ASTM B817 Type II vs. Austempered Cast Iron
ASTM B817 type II belongs to the titanium alloys classification, while austempered cast iron belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.
For each property being compared, the top bar is ASTM B817 type II and the bottom bar is austempered cast iron.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 100 | |
| 180 |
| Elongation at Break, % | 3.0 to 13 | |
| 1.1 to 13 |
| Poisson's Ratio | 0.32 | |
| 0.29 |
| Shear Modulus, GPa | 40 | |
| 62 to 69 |
| Tensile Strength: Ultimate (UTS), MPa | 900 to 960 | |
| 860 to 1800 |
| Tensile Strength: Yield (Proof), MPa | 780 to 900 | |
| 560 to 1460 |
Thermal Properties
| Latent Heat of Fusion, J/g | 400 | |
| 280 |
| Melting Completion (Liquidus), °C | 1580 | |
| 1380 |
| Melting Onset (Solidus), °C | 1530 | |
| 1340 |
| Specific Heat Capacity, J/kg-K | 550 | |
| 490 |
| Thermal Expansion, µm/m-K | 9.9 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 37 | |
| 2.9 |
| Density, g/cm3 | 4.6 | |
| 7.5 |
| Embodied Carbon, kg CO2/kg material | 40 | |
| 1.8 |
| Embodied Energy, MJ/kg | 650 | |
| 25 |
| Embodied Water, L/kg | 220 | |
| 48 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 26 to 120 | |
| 19 to 95 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 2890 to 3890 | |
| 880 to 3970 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 34 | |
| 25 |
| Strength to Weight: Axial, points | 55 to 58 | |
| 32 to 66 |
| Strength to Weight: Bending, points | 45 to 47 | |
| 27 to 44 |
| Thermal Shock Resistance, points | 62 to 66 | |
| 25 to 53 |
Alloy Composition
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| Aluminum (Al), % | 5.0 to 6.0 | |
| 0 to 0.050 |
| Arsenic (As), % | 0 | |
| 0 to 0.020 |
| Carbon (C), % | 0 to 0.1 | |
| 3.4 to 3.8 |
| Chlorine (Cl), % | 0 to 0.2 | |
| 0 |
| Chromium (Cr), % | 0 | |
| 0 to 0.1 |
| Copper (Cu), % | 0.35 to 1.0 | |
| 0 to 0.8 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 |
| Iron (Fe), % | 0.35 to 1.0 | |
| 89.6 to 94 |
| Magnesium (Mg), % | 0 | |
| 0 to 0.040 |
| Manganese (Mn), % | 0 | |
| 0.3 to 0.4 |
| Molybdenum (Mo), % | 0 | |
| 0 to 0.3 |
| Nickel (Ni), % | 0 | |
| 0 to 2.0 |
| Nitrogen (N), % | 0 to 0.040 | |
| 0 |
| Oxygen (O), % | 0 to 0.3 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.040 |
| Selenium (Se), % | 0 | |
| 0 to 0.030 |
| Silicon (Si), % | 0 to 0.1 | |
| 2.3 to 2.7 |
| Sodium (Na), % | 0 to 0.2 | |
| 0 |
| Sulfur (S), % | 0 | |
| 0 to 0.020 |
| Tin (Sn), % | 1.5 to 2.5 | |
| 0 to 0.020 |
| Titanium (Ti), % | 82.1 to 87.8 | |
| 0 |
| Vanadium (V), % | 5.0 to 6.0 | |
| 0 to 0.1 |
| Residuals, % | 0 to 0.4 | |
| 0 |